.header{
    width: 710px;
    height: 305px;
    margin: 0 auto;
    padding: 0 25px 10px 25px;
    background-color: aliceblue;
}
.page{
    width: 710px;
    margin: 0 auto;
    padding: 0 25px;
}
.left-page{
    float: left;
    width: 460px;
    padding: 5px 0 0 5px;
    background-color: #999999;
}
.right-page{
    float: right;
    width: 240px;
    padding: 5px 5px 0 0;
}
.footer{
    float: left;
    width: 710px;
    height: 45px;
    margin: 0 auto;
    padding: 0 25px 25px 25px;
    background-color: #555555;
}
nav a{
    float: left;
    padding: 0 5px;
}
